Attachment for cranes



Oct. 3, I933. J. J. GAULT ATTACHMENT FOR CRANES Filed March 2, 1931 2 Sheets-Sheet l l :|llll lllllllllmlm.

jam @7222, J 6 39" QQM Q9. 72%@ 1%?! Oct. 3, 1933. J. J. GAULT ATTACHMENT FOR CRANES Filed March 2, 1931 2 Sheets-Sheet 2 kjohn J 6m 64m 02% Patented Oct. 3, 1933 a H 1,928,966 y ATTACHMENT FOR-CRANES 10111; J. Gault, Chicago, 111., assignor to-William J. Newman Company, Chicago, Ill

Application Ma n, 1931; sci-mint. 519,606

lClaim. (o1. zrzqss This invention relates to attachments adapted for use withcranes and'particularly standard "cranes having the usual booms, to provide 'means-"for-handling various materials and par- 5 ticularly for handling concereteon high and 'wide lifts.v If the boom of a standard crane is lowered to give sufficient horizontal distanceor swingit is frequently impossible to'project'the end of the boom over a wall or the like so as 10 the crane and at a relatively high elevation.- :The

present invention'is intended to overcome these limitations of a standard crane by providing an attachment which may be readily applied theree erations not possible with the ordinary crane.

The objects of the invention are to provide a cantilever boom or extension for a standard crane boom; to provide means whereby a standard crane may be utilized for placing material atgreater heights and distances from the body of the crane than is possible with the crane' boom; to provide an attachment of the character indicated whichmay be applied to and removed from a standard crane with but little inconvenience or changes in the crane; to provide a crane with novel material handling mechanism; and to provide such other advantages and features of construction as will appear from the following description taken in connection with the accompanying drawings in which;

Figure 1 is a side elevation illustrating a crane of the caterpillar type with one form of my attachment'applied thereto; v

Figure 2'is an end view; a

Figure 3 is a plan view of a cantilever orextension boom;

Figure 4 is a sectional detail taken on the line 44 of Figure l; V

Figure 5 is a sectional detail taken on the line 5-5 of Figure 1;

Figure 6 is a side view showing a modified form of construction and indicating the purposes of the attachment;

to place materialat a substantial distance from to and which will'serve to perform work or op- Figure 'I is a plan view of a portion of Figure 7 guide sheave orsheaves 151; This shaft is preferably elongated to provide 'a support for a cantilever boom or transverse beam 16. This boom may 7 be made 'inany suitable manner but is shown as constructed with side beams or channels l 'laandrsuitable cross bracing to form 'a'stiff and substantial boom. The side beams 17 have sections of angles 18 secured thereto to 1 embrace the ends of the shaft 14 thereby forming bearings for-the boom so that the boom may 5 be" readily placed in position or removed from theshaft. 'An anchor frame or post 19 is con- :riected with the rearnend of 'theboom 16 by a I cross bolt or shaft 20 and extends down to the frame 11 to which it is attached by means of a suitable A-frame 21. The anchor frame 19 is preferably built up of side beams 22 and suitable cross bracing 23 to make a rigid structure.

A sheave 24 is mounted at the outer end of the boom 16 and the hoist line or cable 25 from 7 the drum 26 passes over it as well as the sheave 15. The free .end of the cable may be provided with a hook 27 or other suitable means for lifting loads such as buckets or containers for concrete;

' The operation of this crane will be readily'understood but attention is called tothe fact that with this novel construction, the material may be picked up off from the ground and then swung out and'elevated to a higher position than would 35 be possible with the standard crane boom.

Figures 6 to 8 show a modified form of construction as also applied to a standard crane. In this form the cantilever boom 28 comprises a rear frame portion 29 which is supported on the I shaft 14 as heretofore described and is connected at its rear end with the body of the crane by an anchor frame 30. At the outer end of the boom 28'is an eye beam or other suitable beam 31 to provide a track for a'carrier 32 of the type commonly known as a hay carrier. The crane is provided with one drum 3 3 having a cable or line 34 which passes over a sheave 35 on the crane boom 13, then over a sheave'36 of the boom 13 then over a pulley 40 on the carriage 32, then down under a pulley 41 which supports a lifting hoist 42 and its outer end iscon- .110

1 structure 47. After it is dumped the. reverseoperations take place .preparatoryfor again fi1l-- nected at 43 to the carriage 32. The beam 31 is provided with adjustable trips 44 and for releasing the hook. As the construction of such carriages is well known and forms no part of this invention, further description will be omitted. Any suitable bucket or receptacle 46 is carried by the hook 42 for receiving the material to be elevated. I

Figure 6 indicates *the ;method of. operation of the device in placing concrete or the'like on the top of an elevated structure such as shown at 47. When the carriage is at an inner position as shown in full lines in this figure, the cable 37 may be slackened which permits the 'bucket w to descend to the ground gspreparatorytfor filling. As soon as the bucket is fllied-the-cableB'? is wound up thereby elevating the bucket until the catch on the carrier "32trips or-engagesso as to hold the pulley 41 and hook suspended rfrom the carriage. The cable 37 is then payed out and the cable 34iis wound up, thereby pulling the carriage -32- out' alongtthe beamlor track 31 until it engages with the 'trip 45which releases the pulley 'a'nd hook zthereby'ipermitting the bucket 46 to be lowered'tofdumping position over the ing the bucket.

- *By' means of this iarrangementlta standard cranemay beutilized to'ele'vate and place the material much-morerapidly and-eificiently than when used' inthe ordinarylmanner. With this particulariorm the :materialmay handled without rotating the crane as well as obviating the necessity of raising and lowering the crane boom.

Furthermore, with either form of the invention, material maybe elevated and deposited in positions which would be impossible or inconvenient to reach with an ordinary crane. It will of course, be understood that sufiicient counterweight is provided to :balance the structure and the load as is common with machines of this v character. It will also be noted that the details :of construction may be varied in order to adapt the attachment for different uses or for different makesofcranes and therefore I do not wish to be limited to the constructions shown and described except as specified in the following claim, inwhich I claim.

-The combination'with a standard crane having a rotatable main frame and swinging boom carriedthereby, of an elongated shaft at the outer .J H J. GAULT. 

